Bond Length

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Viviana Velasquez
Posts: 97
Joined: Sat Jul 20, 2019 12:15 am

Bond Length

Postby Viviana Velasquez » Sun Nov 17, 2019 4:16 pm

How do we determine bond lengths?

chemboi
Posts: 101
Joined: Sat Jul 20, 2019 12:16 am

Re: Bond Length

Postby chemboi » Sun Nov 17, 2019 4:21 pm

They are experimentally determined.

Dan M -3E
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Joined: Wed Sep 18, 2019 12:19 am

Re: Bond Length

Postby Dan M -3E » Sun Nov 17, 2019 7:49 pm

We don't determine bond lengths ourselves, we are given the lengths because they have been experimentally found from repeated experiments of different molecules involving the same atom.

Anna Chen 1K
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Joined: Thu Jul 25, 2019 12:18 am

Re: Bond Length

Postby Anna Chen 1K » Sun Nov 17, 2019 7:51 pm

Bond length is determined by the bond order, or the number of bonded electrons. This has to be derived from experiments.

Jasmine Summers 4G
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Joined: Wed Sep 18, 2019 12:17 am

Re: Bond Length

Postby Jasmine Summers 4G » Sun Nov 17, 2019 7:56 pm

As mentioned, it is determined experimentally. We just need to know that double bonds are stronger and shorter than single bonds.

205154661_Dis2J
Posts: 109
Joined: Wed Sep 18, 2019 12:21 am

Re: Bond Length

Postby 205154661_Dis2J » Sun Nov 17, 2019 8:05 pm

The bond length is determined experimentally, so we do not determine the bond lengths ourselves.

Merin Padayatty 3G
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Re: Bond Length

Postby Merin Padayatty 3G » Tue Nov 26, 2019 11:35 am

The exact bond length is derived from experiments, but relative bond lengths can be determined from bond order.

annikaying
Posts: 94
Joined: Sat Sep 14, 2019 12:16 am

Re: Bond Length

Postby annikaying » Tue Nov 26, 2019 5:56 pm

You have to be given the actual bond length from previous experiments but there are general guidelines such as double bonds being shorter than single bonds.

Bita Ghanei 1F
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Joined: Thu Feb 28, 2019 12:15 am

Re: Bond Length

Postby Bita Ghanei 1F » Tue Nov 26, 2019 6:11 pm

single bonds are longest and weakest, triple bonds are shortest and strongest

Megan Jung 3A
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Joined: Thu Jul 11, 2019 12:17 am

Re: Bond Length

Postby Megan Jung 3A » Tue Nov 26, 2019 9:11 pm

bond lengths are determined experimentally. However, we can compare the bond lengths of different compounds through periodic trends and atomic radii.

Natalie Nartz 4F
Posts: 50
Joined: Thu Jul 11, 2019 12:17 am

Re: Bond Length

Postby Natalie Nartz 4F » Wed Nov 27, 2019 5:36 pm

We don't actually have to calculate bond length quantitatively. Just remember single bonds are longer than double and triple bonds

lwong Dis1L
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Joined: Wed Sep 30, 2020 9:37 pm

Re: Bond Length

Postby lwong Dis1L » Tue Oct 06, 2020 10:25 pm

I have not learned anything about Angstroms and cannot find a lot about it online. Can someone walk me through how to solve the problem below?

All of the organic compounds contain C and H as their essential elements, the bond length of C-H is 110 pm. Express the C-H bond length in Angstrom.

David Chibukhchian 1H
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Joined: Wed Sep 30, 2020 9:50 pm

Re: Bond Length

Postby David Chibukhchian 1H » Wed Oct 07, 2020 9:48 am

lwong Dis1L wrote:I have not learned anything about Angstroms and cannot find a lot about it online. Can someone walk me through how to solve the problem below?

All of the organic compounds contain C and H as their essential elements, the bond length of C-H is 110 pm. Express the C-H bond length in Angstrom.


Basically, one Ansgtrom is equal to 10^-10 meters. You can use that as a reference in this situation to help you find your answer. 110 pm is the same as 110 x 10^-12 m. If you plug that into your calculator, you can see that you get 1.1 x 10^-10 meters. Thus, this means there are 1.1 Angstroms in the C-H bond length if one Angstrom is 10^-10 meters. I hope that makes sense!!

Jessica Katz 1G
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Re: Bond Length

Postby Jessica Katz 1G » Wed Oct 07, 2020 10:22 am

bond length can be done experimentally, but it can be estimated by doing a lewis structure of the molecule and see whether it is a triple, double, or single bond because that will tell you its relative length compared to the other bonds in the molecule. Triple bond is the shortest while single bond is the longest and weakest.

Kelly Yun 3K
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Joined: Wed Sep 30, 2020 10:03 pm

Re: Bond Length

Postby Kelly Yun 3K » Thu Oct 08, 2020 12:42 am

So would that mean that breaking a triple bond would release the most amount of energy?

Kiyoka Kim 2I
Posts: 46
Joined: Wed Sep 30, 2020 9:59 pm

Re: Bond Length

Postby Kiyoka Kim 2I » Thu Oct 08, 2020 1:20 am

Yes. Because triple bonds are the strongest, they require more energy compared to single and double bonds to break.

Inderpal Singh 3B
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Re: Bond Length

Postby Inderpal Singh 3B » Tue Nov 03, 2020 5:47 pm

Triple bonds are the strongest bond so they would indeed require more energy than single and double bonds to break.

Taber Ball 1F
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Joined: Wed Sep 30, 2020 9:51 pm

Re: Bond Length

Postby Taber Ball 1F » Thu Nov 05, 2020 11:17 am

Hi! So bond length and bond strength are inversely related meaning that as the bond length increases, its strength decreases and vise-versa. I found this website which compares different examples of bonds (single, double triple) and their lengths and energy (see table 9.4). Hope you guys find this helpful!

https://openstax.org/books/chemistry-at ... lent-bonds

DominicMalilay 1F
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Joined: Wed Sep 30, 2020 9:36 pm

Re: Bond Length

Postby DominicMalilay 1F » Fri Nov 06, 2020 10:48 pm

x-ray diffraction is used to determine the bond length.

DavidTabib
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Joined: Wed Sep 30, 2020 10:06 pm

Re: Bond Length

Postby DavidTabib » Sun Nov 08, 2020 5:26 pm

They are experimentally found so we don't need to find it ourselves.

Muskaan Abdul-Sattar
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Joined: Wed Nov 13, 2019 12:19 am

Re: Bond Length

Postby Muskaan Abdul-Sattar » Sun Nov 08, 2020 11:02 pm

They are found experimentally!

LovepreetSran_2B
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Joined: Wed Sep 30, 2020 9:33 pm

Re: Bond Length

Postby LovepreetSran_2B » Sun Nov 08, 2020 11:09 pm

Bond lengths are experimentally determined.

FionaHunter21
Posts: 34
Joined: Wed Sep 30, 2020 9:37 pm

Re: Bond Length

Postby FionaHunter21 » Mon Nov 09, 2020 11:47 am

So shorter bond lengths have higher energies right? Since they are stronger the energy of the bond is more negative, but is it still considered higher energy?


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